JPS5915883A - Apparatus for detecting abnormality of photoelectric tube - Google Patents

Abstract

PURPOSE:To enhance the safety and the reliability of a three-dimensional parking zone, by a method wherein a means capable of blocking voltage supplied to a floodlight is provided and the driving of a cage is inhibited in the case of an obstacle which is, in turn, informed. CONSTITUTION:When a light receiver is abnormal, because the relay RY20 of the light receiver 20 is still energized even if confirming buttons BS1, BS2 are pressed to block voltage supplied to a floodlight 10, a restoration relay TRY1 is not energized while a relay RY3 is not also energized and a cage drive apparatus is not driven. When the button BS1 is pressed to energize a relay RY1 and a relay RY2 and a contact RY2c is closed to energize an operation delay relay TRY2 after a predetermined time, a buzzer BZ is alarmed by a closed circuit E+ TRY2a RY3d BZ E- and, therefore, the obstacle of a photoelectric tube can be known by an operator.

Description

[Detailed description of the invention] It is.

Conventionally, in vertical circulation type multilevel parking systems, as shown in Figure 1, for example, four sets of phototubes each consisting of a projector and a receiver are installed in the tower to perform safety checks before driving, parking, and empty parking. The presence or absence of is being determined.

That is, when a car is stopped at a predetermined stopping position (the position of rectangle 1 in the figure), a photocell 2 (light projector 2a) is installed at approximately the depth of the tower.

If only the light beam from the light receiver 2b) is blocked, and the car is pushed too far into the tower, the light beams from both the photoelectric tube W5 (emitter 3a, light receiver 3b) installed at the innermost part of the tower and the phototube 2 mentioned above will be blocked. If the entrance/exit inside the tower is blocked and you park your car in front, the photocell 4 installed second from the tower I
By blocking the light beams from both the light receiver 4b) and the phototube 2, it is possible to guide and confirm that the car is parked in its normal position, as well as to determine whether the car is parked or empty.

If a light receiver 5b) is installed to block the light beams from the phototube 4 and the photoelectric tube W5 separately, it means that a person is entering or leaving the tower (if it blocks the beams from the phototube 4 and the photoelectric tube W5 at the same time, it means that a car is entering the tower. The system recognizes that the cage is being taken out of the warehouse, and in the event of danger, cuts off the power supply to the cage drive device to prevent the drive device from operating.

When using such a phototube, if the receiver outputs a light-blocking state due to a failure of the photoelectric device, for example, if the emitter bulb burns out or the optical axis is misaligned, the receiver always does not activate the drive device. Although this function is fail-safe, it is extremely dangerous if the receiver itself malfunctions and becomes constantly illuminated. Conventionally, there have been no safety measures that take into account such failures in which the light receiver itself is constantly exposed to light.

The present invention has been made in view of the above points, and an object of the present invention is to provide an abnormality detection device capable of detecting an abnormality in a phototube each time an automobile enters or leaves a garage.

Figure 2 is an implementation circuit diagram of the abnormality detection device according to the present invention. In the figure, E+ and E- are power bus bars, and BS1 and ES2 must be pressed after confirming the safety inside the tower before operating the cage. A confirmation button interlock switch with a built-in indicator light (not shown), BSL is the normally open contact of the switch,
BS2 is also the normally closed contact of the switch.

RY1 to RY3 are relays that are energized when voltage is applied, RYIa is a normally open contact of relay RY1, RY2a,
RY2c is a normally open contact of relay RY2, RY3a is a normally open contact of relay RY3, and RY3b.

RY3d is the normally closed contact of relay RY3, 10 is the floodlight, 2
0 is a light receiver, and when light is irradiated to the light receiver 20, relay R is activated.
Voltage is applied to Y20 and relay RY20 is energized o RY20a is the normally open contact of relay RY20, RY2
0b is the normally closed contact of relay RY20, TRYl
TRY is a recovery delay relay that is energized when voltage is applied and continues to be energized for a predetermined time even after the applied voltage disappears.
ia is a normally open contact of a recovery delay relay, TRY2 is an operation delay relay that is activated after a predetermined time when voltage is applied, TRY2a is a normally open contact of the operation delay relay TRY2, and BZ is a buzzer.

Hereinafter, the operation of the apparatus of the present invention will be explained using the drawings in cases where the light receiver is normal and abnormal.

When the phototube determines that the operation of entering or leaving the vehicle has been completed, an indicator light (not shown) built into the confirmation button lights up, requesting the operator to confirm the operation of the phototube. At this time, in FIG. 2, a voltage is applied to the emitter 10, and the relay RY20 of the receiver 2G is applied.
is normally energized. Operator confirms button BS
1. When BS2 is pressed, the supply voltage to the emitter 10 is cut off by opening the confirmation button BS2, and the voltage supplied to the receiver 20 is cut off.
relay RY20 is deenergized and the closed circuit “E
Relay RY1 by 10-BSl-RYl-E-J
is energized, and relay RY2 is activated by closing contact RY1a.
energizes the closed circuit 1 to + -RY3b -RY2a
-RY2- E -J allows relay RY2 to self-hold. Then, by closing the contact RY2c of the relay RY2, a voltage is applied to the operation delay relay TRY2.

[If the receiver is normal]

When the light receiver is normal, when the confirmation button BS2 is pressed, the relay RY20 of the light receiver 20 is deenergized.
Closed circuit [+ -Bl -Ry2ob-TRYl -
Restoration delay relay TRY1 is energized by E-J, contact TRY1a is closed, and the operator presses confirmation button B.
S1. When BS2 is released, voltage is again applied to the emitter 1° through the confirmation button ES2, energizing the relay RY20 of the receiver 2o, opening the contact RY20b and closing the contact RY20a. By the way, the confirmation button ES1 and the contact RY2 of the relay RY20
Even if 0b is opened, the recovery delay relay TRY1 is energized for a predetermined time, so when the contact RY20a of the relay RY20 is closed, the closed circuit "m+-TRYla" is closed.
-RY20'a -RY3 - Relay RY3 is energized by the occurrence of E-J, and relay RY3 is self-held by closing contact RY3a. Relay RY3
When energized, power is supplied to the cage drive device to drive the cage, and relay RY2 is deenergized by opening contact RY5b, and voltage applied to operation delay relay TRY2 is released by opening contact RY2c, and the operation is started. Activation of delay relay TRY2 can be prevented. After that, when the car enters or leaves the garage, the light beam from the projector 1o is blocked, so the relay RY20 is deenergized and each relay is reset to its initial state.

[If the receiver is abnormal]

Next, in the case of a failure in which the receiver always recognizes the light passing state,
Confirm button ES1. Even if BS2 is pressed and the supply voltage to the emitter 10 is cut off, the relay RY2G of the receiver 2G
remains energized, so the recovery delay relay TRY1
Since relay RY3 is not energized and relay RY3 is not energized, the cage drive device is not driven. Then, confirmation button BS1 is pressed and relay RY1 is energized.

When the relay RY2 is energized and the operation delay relay TRY2 is energized after a predetermined time due to the closing of the contact RY2c, the closed circuit [E-1--TRY2a-Ry3a-
BZ -K-j causes the buzzer BZ to sound, allowing the operator to know that the phototube is out of order.

In addition, if a failure occurs in which the light receiver does not operate even if it receives light, relay RY20 is not energized and contact RY20a continues to be open, so relay RY3 is not energized and the cage drive device is not driven. No, confirm button B
S1 is pressed, relay RYI is activated, relay RY2 is activated.
is energized, and when the operation delay relay TRY2 is energized after a predetermined time due to the closing of the contact RY2C, the closed circuit "E1-
Since TRY2a -RY3d -BZ -E-J causes the buzzer BZ to sound as in the case described above, the operator can be informed of the failure of the phototube.

As described above, according to the present invention, a means for cutting off the voltage supplied to the floodlight is provided, and the means is used to reliably check whether or not there is a failure in the phototube before driving the cage, and if there is a failure, the cage is driven. This system not only prohibits the occurrence of malfunctions but also notifies the operator that there is a malfunction, making it possible to provide an extremely safe and reliable multilevel parking system.

In the above description, a case has been described in which a conventional confirmation switch is used, but this may be implemented by separately providing a new switch (the present invention is not limited to the embodiment). Further, in the following explanation, a case has been described in which a buzzer is used to notify the operator of an abnormality, but it is clear that notification may be made using a display device or the like. Furthermore, it is clear that the present invention can be used not only for phototubes used in safety devices of multilevel parking systems, but also for detecting abnormalities in phototubes for automatic ticket gates and the like.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the arrangement of phototubes in a vertical circulation multilevel parking system, and FIG. 2 is a circuit diagram of an implementation of the phototube abnormality detection device according to the present invention. 2-500. Phototubes 2a to 5; a, 10, , floodlights 2b to 5b
, 20. , , light receiver BS1. BS2 , , , confirmation button RY1~R
Y3. RY2.0. ,,Relay TRY1. ．． ．． Recovery delay relay TRY2. ',,Operation delay relay BZlo, buzzer patent applicant Fujichik Co., Ltd. 11'

Claims (1)

[Claims] A phototube consisting of a set of a light emitter and a light receiver is provided with a relay that operates when the light receiver normally receives light and means capable of cutting off the voltage supplied to the light emitter, and when the means cuts off the voltage supplied to the light emitter, the 1. An abnormality detection device for a phototube, comprising means for cutting off power supply to a drive device when a relay is in a light receiving operation.